Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites. Should I connect JUST the 3-pin fan connect to the 4-pin mobo header? $7.20 $ 7. All Rights Reserved. If you have a fan with a 4-pin connector, can you just connect that to a motherboard 3-pin header or a molex adapter? The four wire connectors are for processor fans with higher power consumption. The difference between two and three pin is the third wire is for rpm monitoring. What should I do. The 4th pin is for PWM speed control. Since both 3- and 4-pin fans CAN be controlled for speed by this method, this Hub can be used with any mix of 3- and 4-pin fans connected to it, and all of them are based on the control signal from the one mobo fan header it is plugged into. The former is a very inaccurate and unsafe method and you will find that most motherboards today have done away with voltage changing on 3 pin fans. Splitter cable adapters for use with two PWM fans (if designed correctly) only have one four pin connection for the fans, the other is a four pin connector with only three wires/pins on … Only 8 left in stock - order soon. Get it as soon as Tue, Dec 8. Want to read more answers from other tech-savvy Stack Exchange users? Get it as soon as Thu, Dec 3. How many fans can the Grid + v3 support? 3-pin vs 4-pin fan connector compatibility. Check out the full discussion thread here. Color: Black Length: 4 inches. Only 14 left in stock - order soon. Yes, the 4-pin fans have a PWM input, which can be driven from an Arduino using a small signal NPN transistor, a small signal N-channel mosfet, or even just a diode. Since we launched in 2006, our articles have been read more than 1 billion times. Joined Oct 6, 2004 Messages 2,236. The other 3 fans were 4 pin Phanteks 140mm fans. Kraken pump is working but my RGB lighting is not. My mobo has a 4-pin header, but my yate loon fan has the 4-pin molex power and a 3-pin connector. Short Answer: Get the Phobya or Swiftech hub if you need 3 and 4 pin PWM control at the same time. 4-pin fans, or "PWM" fans, don’t have this issue as the 4th pin on the fan allows voltage changes to be made more quickly and less erratically. Join 350,000 subscribers and get a daily digest of news, geek trivia, and our feature articles. 0 jankerson Judicious. Long answer: OK so I built a huge 15 fan monster with the Enthoo Primo case a few years ago and all 6 of my fans were 3 pin only. FREE Shipping on orders over $25 shipped by Amazon. There are cables that convert 3 pin to 4 pin but you'd be losing all the addressable features and it would just work like a regular, solid colour LED fan. Have something to add to the explanation? If you connect the 4 Pin fan connector to a 3 Pin header, then the fan will run at maximum RPM. Sep 10, 2006 7,885 139 The three wire connectors are for small chassis fans with lower power consumption. The signal wire measures how fast the fan is moving without any controls for the fan’s speed. Reactions: boddole. What's the difference between 3-pin and 4-pin fans? A four pin connector is a little different than the three pin connector since it has the extra (fourth) wire used for controlling and sending signals to the fan, which likely has a chip on it that tells it to slow down or speed up (in addition to the other wires the three pin connector has). Thread starter venm11; Start date Jul 25, 2011; Jul 25, 2011 #1 V. venm11 2[H]4U. 3-pin fans, or "DC" fans, are typically worse than 4-pin fans when changes are made to the voltage in order to adjust the speed of the fan. SuperUser contributor Homey_D_Clown_IT has the answer for us: A three pin connector is basically power (5/12 volt), ground, and signal. Check out the full discussion thread here, How to Add a Traffic Report Using Google Maps, How to Hide Favorites on Safari’s New Tab Page on iPhone and iPad, How to Enable Holiday Sounds on Ring Video Doorbells, How to Change the Video Playback Speed on Netflix, © 2020 LifeSavvy Media. Or, should I ALSO connect the fan molex connector to power it as well? The wiring to the connector will follow the same color scheme. Proper fan connector placement is shown in the figures below: Fan has a 3-pin power connector; desktop board has a 4-pin fan header: Note: when using a 3-pin power connector with a 4-pin fan header, the fan will always be on; there is no fan control. Double check to make sure you do not reverse the wiring. FREE Shipping on orders over $25 shipped by Amazon. What is Adaptive Noise Reduction and How Do I Use It? If you want to use the PWM function then the 4 Pin fan must be connected to a 4 Pin header on the motherboard. She has previously written under the pen name "Asian Angel" and was a Lifehacker intern before joining How-To Geek/LifeSavvy Media. 2 Pack USB to 3-Pin / 4-Pin PWM 5V USB Sleeved Fan Power Adapter Cable, USB to 3 Pin / 4 Pin Case Fan Adapter Connector Cable (USB-3Pin/4Pin Cable) 4.4 out of 5 stars 90. Make Offer - 4-Pin to 3-Pin fan Power Cable Adapter Connector Computer Cooling Fan Cables W4. NOTE: When in use PWM function will cease to operate and fan will run at 100%. Joined 2 Pack 3-Pin ATX Fan to 4-Pin Molex Connector Cable Fan Power Adapter, 4-pin Molex/IDE to 3 Pin CPU Fan Power Cable. Another connection that you might see is the two/three pin header going to something that looks like the connectors on your computer's power supply. I finally replaced my CPU fan from a 3 pin to a 4 pin connector to hear the difference in sound. $7.20 $ 7. $6.49. We trust in our products at Coolerguys and test everything that is sent out! 4-pin uses 12v, and is not cross compatible without a specialised adapter. Changes can easily cause the fan to stall or modulate erratically if the voltage isn’t correct. 4.1 out of 5 stars 4. $5.99 $ 5. 98. Get it as soon as Wed, Dec 9. 4.4 out of 5 stars 54. In laptops,almost all notebook fans use 3 pin or 4 pin connectors. When connected to 3-pin fan headers, the fan will run at full speed (unless the mainboard supports voltage based speed control). RE … Optimizing system performance vs. noise with Adaptive Noise Reduction. The ASUS boards will handle fan-control for either 3-pin or 4-pin fans from those ports. Two of the pins provide power to the fan, the 3rd provides an RPM pulse to the motherboard to read the speed. The PWM frequency is supposed to be 25KHz, which can be generated from timer 1 or 2 on a Uno if you don't need to use the other PWM pin on the same timer for PWM. Fans and on-board fan headers are backwards compatible. 3 pin fans were speed controlled via changing the voltage, where as the voltage on 4 pin fans is the same, the rotations are simply sent through a second wire. PWM fans come with a 4-pin connectors for fully automatic speed control via your mainboard’s 4-pin PWM fan headers. 2 Pack 3-Pin ATX Fan to 4-Pin Molex Connector Cable Fan Power Adapter, 4-pin Molex/IDE to 3 Pin CPU Fan Power Cable. FREE Shipping on orders over $25 shipped by Amazon. What is the difference between three and four wire fans? You cannot connect a 3-pin RGB connector to anything other than a specialised 3-pin RGB header. Please note that 4-pin fans can also be connected to your mainboard’s 3-pin fan headers though. 4-pin fans, or "PWM" fans, don’t have this issue as the 4th pin on the fan allows voltage changes to be made more quickly and less erratically. ON later Asus MB the CPU fan headers only support 4pin PWM fans but others (chassis) can run 3 pin, but if you can find PWM for your needs (speed, … GEMWON is a professional laptop fan wholesaler, you can buy all brand original laptop fans here, including HP/Dell/Asus/MacBook. The only difference between a two and three pin connector is that the third pin (assuming that your mother board has a three-pin connection as well) allows you to monitor the fan's rotation speed. Yes! A four wire fan connecting to a four pin fan header: A four wire fan connecting to a three pin fan header: Source: Three Wire and Four Wire Fan Connectors [Intel]. Chassis and processor fans use either a three wire or four wire connector. Thanks for any helpful feedback. Apparently a 3-pin fan can plug directly into a 4-pin socket. By submitting your email, you agree to the Terms of Use and Privacy Policy. 3-pin headers contain 2 connectors for current and grounding and a third connector that relays information to the user about the RPM of the fans for monitoring purposes. FREE Shipping on orders over $25 shipped by Amazon. Sound off in the comments. SuperUser reader RockPaperLizard wants to know what the difference is between three and four wire CPU fans: What is the difference between three and four wire CPU cooling fans (besides the obvious answer of one wire)? How do I rotate my pump on my Kraken Z Cooler? Personal Computers $7.98 $ 7. Join 350,000 subscribers and get a daily digest of news, comics, trivia, reviews, and more. 4.1 out of 5 stars 4. 2 Pack Molex to 3 x 3 Pin or 4 Pin Computer PC Case Fan Power Splitter Adapter Cable, 10 inch. Today’s SuperUser Q&A post has the answer to a curious reader’s question. Changes can easily cause the fan to stall or modulate erratically if the voltage isn’t correct. Free shipping. Once you have the opportunity to start looking inside multiple computer cases, you may notice that some CPU cooling fans have an extra wire compared to others. With this type, fan speed is typically controlled by increasing or decreasing the voltage over the power wire. 4th pin is for pwm design fans. How-To Geek is where you turn when you want experts to explain technology. Please Note: You can connect a 4 Pin Fan to a 3 Pin or 4 Pin header on the motherboard. 4-pin fans, or "PWM" fans, don’t have this issue as the 4th pin on the fan allows voltage changes to be made more quickly and less erratically.If you have any further questions, please contact our Customer Support Team. 4 Pin PWM to 3 Pin Standard Fan Adapter Connect 4 pin PWM connections to standard 3 pin fan adapter. Akemi Iwaya has been part of the How-To Geek/LifeSavvy Media team since 2009. 4-pin old fan: Red, Blue, Black, Yellow 3-pin new fan: Red, Black, Yellow You are going to replace the new fan's 3-pin connector with the 4-pin connector from the old fan. Use the CPU_FAN and CPU_FAN_OPT ports for PWM fans or for the fan-control plug of the hub. The above article may contain affiliate links, which help support How-To Geek. 99. Get it as soon as Tue, Dec 8. Changes can easily cause the fan to stall or modulate erratically if the voltage isn’t correct. 3-pin ARGB uses 5V power, and a different pin layout. 1. What is the difference between three and four wire CPU fans? and yes you can use a 3 pin fan on a 4pin header. 4-Pin to 3-Pin fan Power Cable Adapter Connector Computer Cooling Fan Cables W4. FREE Shipping on orders over $25 shipped by Amazon. Sep 16, 2007 #2 J. JaYp146 Supreme [H]ardness. She has been quoted as an authoritative source by ZDNet Worldwide. Four pin fans plug into your power supply which can be nice to use if your power supply has thermal controls - … 99. 3-pin connectors can have their RPM modulated by adjusting the voltage sent to the fan, although this method isn’t as precise as 4-pin … BANNED. 3-pin fans, or "DC" fans, are typically worse than 4-pin fans when changes are made to the voltage in order to adjust the speed of the fan.
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